Datasheet PI3C3125L, PI3C3125Q, PI3C3125W, PI3C3126L, PI3C3126Q Datasheet (PERICOM)

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PS8153B 12/10/99

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PI3C3125
PI3C3126

2.5V/3.3V, High Bandwidth, Hot Insertion,4-Bit,
2-Port Bus Switch with Individual Enables

Product Description

Pericom Semiconductors PI3C series of logic circuits are produced
using the Companys advanced sub micron CMOS technology,
achieving industry leading speed grades.

The PI3C3125A and PI3C3126A are 2.5V or 3.3 Volt, 4-bit bus
switches designed with four individual 5Ω bus switches with fast
indiviual enables in an industry standard 74XX125/126 pinout.
When enabled via the associated Bus Enable (BE) pin, the A pin
is directly connected to the B pin for that particular gate. The bus
switch introduces no additional propagation delay or additional
ground bounce noise.

The PI3C3125 device has active LOW enables, and the PI3C3126A
has active HIGH enables. It is very useful in switching signals that
have high bandwidth (>400 MHz).

Product Features

 Near zero propagation delay
5Ω switches connect inputs to outputs
 High Bandwidth (>400 MHz)
 Rail-to-Rail, or 2.5V or 3.3V Switching
 5V I/O Tolerant
 2.5V Supply Voltage Operation
 Permits Hot Insertion
 Packages available:

 14-pin 150 mil wide plastic SOIC (W)
 14-pin 170 mil wide plastic TSSOP(L)
 16-pin 150 mil wide plastic QSOP (Q)

Applications

 High Bandwidth Data Switching
 Hot Docking

PI3C3125 Logic Block Diagram PI3C3126 Logic Block Diagram

BE0

A0

B0

BE1

A1

B1

BE2

A2

B2

BE3

A3

B3

BE0

A0

B0

BE1

A1

B1

BE2

A2

B2

BE3

A3

B3

2

PS8153B 12/10/99

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PI3C3125/PI3C3126

2.5V/3.3V, High Bandwidth,

Hot Insertion, 4-Bit, 2-Port Bus Switch

PI3C3125 14-Pin Configuration PI3C3126 14-Pin Configuration

PI3C3125 16-Pin Configuration PI3C3126 16-Pin Configuration

Pin Description

Pin Name Description

BEn Switch Enable (PI3C3125)
BEn Switch Enable (PI3C3126)
A3-A0 Bus A
B3-B0 Bus B
V

CC

Power

GND Ground

PI3C3125 PI3C3126

BEn BEn An Bn V

CC

Function

X* X Hi-Z Hi-Z GND Disconnect

H L Hi-Z Hi-Z V

CC

Disconnect

LHBnAnV

CC

Connect

Truth Table

(1)

Note:

1. H = High Voltage Level, L = Low Voltage Level
HI-Z = High Impedance, X = Dont Care

* A pull-up resistor should be provided for power-up protection.

Maximum Ratings

(Above which the useful life may be impaired. For user guidelines, not tested.)

Note:

Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the de­vice. This is a stress rating only and functional opera­tion of the device at these or any other conditions
above those indicated in the operational sections of
this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods
may affect reliability.

1
2
3
4
5
6
7

14
13
12
11
10

9
8

Vcc
BE3
A3
B3
BE2
A2
B2

BE0

A0
B0

BE1

A1
B1

GND

14-PIN

W14

1
2
3
4
5
6
7

14
13
12
11
10

9
8

Vcc
BE3
A3
B3
BE2
A2
B2

BE0

A0
B0

BE1

A1
B1

GND

14-PIN

W14

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10

9

Vcc
BE3
A3
B3
BE2
A2
B2
NC

NC

BE0

A0
B0

BE1

A1
B1

GND

16-PIN

Q16

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10

9

Vcc
BE3
A3
B3
BE2
A2
B2
NC

NC

BE0

A0
B0

BE1

A1
B1

GND

16-PIN

Q16

Storage Temperature............................................................65°C to +150°C

Ambient Temperature with Power Applied ............................. 40°C to +85°C

Supply Voltage to Ground Potential (Inputs & VCC Only) ...... 0.5V to +4.6V

Supply Voltage to Ground Potential (Outputs & D/O Only) .... 0.5V to +4.6V

DC Input Voltage ..................................................................... 0.5V to +5.5V

DC Output Current ............................................................................... 120mA

Power Dissipation ................................................................................... 0.5W

14-Pin

L,W

14-Pin

L,W

16-Pin

Q

16-Pin

Q

3

PS8153B 12/10/99

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PI3C3125/PI3C3126

2.5V/3.3V, High Bandwidth,

Hot Insertion, 4-Bit, 2-Port Bus Switch

DC Electrical Characteristics (Over Operating Range, T

A

= –40°C to +85°C, VCC = 3.3V ±10%)

Parameters Description Test Conditions

(1)

Min. Typ.

(2)

Max. Units

V

IH

Input HIGH Voltage Guaranteed Logic HIGH Level 2.0

V

IL

Input LOW Voltage Guaranteed Logic LOW Level –0.5 0.8

I

IH

Input HIGH Current VCC = Max., VIN = V

CC

±1

I

IL

Input LOW Current VCC = Max., VIN = GND ±1 µA

I

OZH

High Impedance Output Current 0 ≤ A, B ≤ V

CC

±1

V

IK

Clamp Diode Voltage VCC = Min., IIN = –18m A –0.73 –1.2 V

R

ON

Switch On Resistance

(4)

VCC = Min., VIN = 0.0V, ION = 48mA or 60mA 5 7 Ω
VCC = Min., VIN = 2.4V, ION = 15mA 8 1 5

Parameters

(5)

Description Test Conditions Typ. Units

C

IN

Input Capacitance VIN = 0V 3.5

C

OFF

A/B Capacitance, Switch Off VIN = 0V 5.0 pF

C

ON

A/B Capacitance, Switch On VIN = 0V 10.0

Notes:

1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.

2. Typical values are at VCC = 3.3V, TA = 25°C ambient and maximum loading.

3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.

4. Measured by the voltage drop between A and B pin at indicated current through the switch. ON resistance is determined by the
lower of the voltages on the two (A,B) pins.

5. This parameter is determined by device characterization but is not production tested.

V

Capacitance (T

A

= 25°C, f = 1 MHz)

Power Supply Characteristics

Parameters Description Test Conditions

(1)

Min. Typ.

(2)

Max. Units

I

CC

Quiescent Power VCC = Max. VIN = GND or V

CC

260 500

Supply Current

∆I

CC

Supply Current per VCC = Max. VIN = 3.0V

(3)

750

Input HIGH

Notes:

1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.

2. Typical values are at VCC = 3.3V, +25°C ambient.

3. Per driven input (control input only); A and B pins do not contribute to ∆ICC.

µA

4

PS8153B 12/10/99

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PI3C3125/PI3C3126

2.5V/3.3V, High Bandwidth,

Hot Insertion, 4-Bit, 2-Port Bus Switch

Notes:

1. See test circuit and waveforms.

2. This parameter is guaranteed but not tested on Propagation Delays.

3. The bus switch contributes no propagational delay other than the RC delay of the
ON resistance of the switch and the load capacitance. The time constant for the
switch alone is of the order of 0.25ns for 50pF load. Since this time constant is
much smaller than the rise/fall times of typical driving signals, it adds very little
propagational delay to the system. Propagational delay of the bus switch when
used in a system is determined by the driving circuit on the driving side of the
switch and its interaction with the load on the driven side.

PI3C3125/PI3C3126

Com.

Parameters Description Conditions

(1)

Min. Max. Units

t

PLH

Propagation Delay

(2,3)

CL = 50 pF, 0.25

t

PHL

A to B, B to A RL = 500Ω

t

PZH

Bus Enable Time 1.5 9.8 ns

t

PZL

CL = 50 pF,

t

PHZ

Bus Disable Time RL = 500Ω, 1.5 8.3

t

PLZ

R = 500Ω

PI3C3125/PI3C3126

Com.

Parameters Description Conditions

(1)

Min. Max. Units

t

PLH

Propagation Delay

(2,3)

CL = 50 pF, 0.25

t

PHL

A to B, B to A RL = 500Ω

t

PZH

Bus Enable Time 1 . 5 6.5 ns

t

PZL

CL = 50 pF,

t

PHZ

Bus Disable Time RL = 500Ω, 1.5 5.5

t

PLZ

R = 500Ω

PI3C3125/PI3C3126 Switching Characteristics over 2.5V Operating Range

PI3C3125/PI3C3126 Switching Characteristics over 3.3V Operating Range

5

PS8153B 12/10/99

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PI3C3125/PI3C3126

2.5V/3.3V, High Bandwidth,

Hot Insertion, 4-Bit, 2-Port Bus Switch

4.0

2.0

0.0

0.0

1.0 2.0

3.0 4.0 5.0

V

OUT

, (V)

VIN, (V)

VCC = 3.3V

3.1V

2.9V

2.7V

2.5V

2.3V

3.6V

3.8V

3.4V

3.2V

3.0V

2.8V

Output Voltage vs. Input Voltage over Various Supply Voltages

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Ordering Information

Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax [phone] • http://www.pericom.com

Output Voltage vs. Input Voltage over Various Supply Voltages